VERTICAL AUTOMOTIVE LIGHTING MODULE WITH IDENTICAL DAY AND NIGHT LIGHTING ASPECTS

Description

Domaine technique

[0001] The invention relates to the field of lighting, in particular automotive lighting. Technique antérieure

[0002] Motor vehicle headlamps currently provide, among other things, three regulatory lighting functions, namely a lighting function with an upper horizontal cut-off, commonly referred to as "low-beam" (or "low-beam" in English), a lighting function without cut-off, commonly referred to as "high-beam" or "high-beam" in English, as well as a daytime running light function commonly referred to as "DRL", an acronym for the English expression "Daytime Running Light".

[0003] The published patent document EP 2 045 515 A1 discloses a lighting module, in particular with a higher horizontal cut-off, i.e. of the "code" type, comprising a vertical optical sheet guide with one end, on the exit face side, of divergent section and forming with the curved exit face a projection lens. The optical sheet guide comprises a reflection face of curved profile, of the parabolic type, configured to reflect the rays coming from the entry face towards the exit face along an optical axis of the lighting module. For this purpose, the light source(s) facing the entry face are located at the focus of the parabolic profile. This document also provides for arranging several optical sheet guides side by side, these sheets joining towards the rear at the level of the reflection face and the entry face.

[0004] The published patent document EP 2 679 884 A1 discloses a lighting module, in particular with a higher horizontal cut-off, i.e. of the "code" type, comprising a horizontal flat optical guide with a series of projection lenses on the output face and a reflection face with a stepped profile for distributing the light transmitted along the guide to the different projection lenses.

[0005] Published patent document US 2011 / 085343 A1 discloses a lighting device comprising a plurality of juxtaposed optical elements.

[0006] The lighting modules described above are advantageous in that they allow regulatory automotive lighting functions to be performed while having an illuminated face, namely the output face of the optical guide, which is thin and elongated, providing an advantage of integration into a vehicle body. However, they have the disadvantage of only providing a single lighting function. To provide the regulatory lighting functions, i.e. with and without horizontal cut-off, it is necessary to provide two lighting modules, possibly arranged side by side. The combined output face then has distinct illuminated aspects depending on the lighting function activated. However, it is desirable for the output or illuminated face to have an identical or at least similar appearance in the different lighting functions. Exposé de l'invention

[0007] The object of the invention is to overcome at least one of the drawbacks of the aforementioned state of the art. More particularly, the objective of the invention is to propose an automotive lighting module providing at least two lighting functions, preferably a lighting function with cut-off and a lighting function without cut-off, while having an essentially constant illuminated appearance. More particularly still, the objective of the invention is to propose an automotive lighting module having a vertically elongated shape.

[0008] The invention relates to a lighting module for a motor vehicle, comprising a plurality of lighting sub-modules each comprising at least one light source; a flat optical guide with an input face facing the at least one light source, an output face and, at the rear of the output face, a reflection face capable of reflecting light from the input face towards the output face; remarkable in that the plurality of lighting sub-modules comprises first lighting sub-modules configured to produce, each, a lighting sub-beam with an upper horizontal cut-off and second lighting sub-modules configured to produce, each, a lighting sub-beam without an upper horizontal cut-off; and the first and second lighting sub-modules are juxtaposed so as to form, along the juxtaposition, several alternations between the first and second lighting sub-modules.

[0009] Juxtaposition means that the lighting sub-modules are arranged side by side with or without clearance.

[0010] A flat optical guide is an optical guide with two main opposite and generally parallel guide faces, these two faces being generally extended without necessarily being perfectly flat. These two faces are separated by a perimeter defining a thickness of the flat optical guide, the thickness of which can also be variable. The input face, the reflection face and possibly the output face are located on this perimeter.

[0011] According to an advantageous embodiment of the invention, the flat optical guides of the plurality of lighting sub-modules extend in a main horizontal or vertical direction, when the lighting module is in the mounting position and observed from the front.

[0012] According to an advantageous embodiment of the invention, the output faces of the flat optical guides of the plurality of lighting sub-modules are adjacent and form an overall output face of the lighting module having a height H and a width l, said height H being greater than or equal to 5 times said width 1. The adjacent output faces may be in direct contact or have a clearance, from near to near.

[0013] According to an advantageous embodiment of the invention, the output faces of the flat optical guides of the plurality of lighting sub-modules each have a width less than or equal to 5 mm.

[0014] According to an advantageous embodiment of the invention, the several alternations between the first and second lighting sub-modules are at a number corresponding to the number of first lighting sub-modules or to the number of second lighting sub-modules.

[0015] According to an advantageous embodiment of the invention, the flat optical guides of the plurality of lighting sub-modules form sheets extending in a main vertical direction, when the lighting module is in the mounting position and observed from the front, and are offset longitudinally relative to each other so that the output faces of said flat optical guides have an inclined and / or curved horizontal profile.

[0016] Advantageously, for at least one, preferably each, of the first and / or second lighting sub-modules, the flat optical guide forming a sheet extending vertically is a first flat optical guide and the at least one light source is at least one first light source, said lighting sub-module comprising a second flat optical guide forming a sheet extending vertically, vertically opposite the first flat optical guide, and at least one second light source illuminating an input face of said second flat optical guide. The second flat optical guide comprises an output face aligned with the output face of the first flat optical guide and a reflection face capable of reflecting light from said input face towards said output face of said second flat optical guide. The at least one first and second light sources are advantageously arranged on opposite faces of a common plate.

[0017] According to an advantageous embodiment of the invention, the output face of each of the flat optical guides of the plurality of lighting sub-modules has a vertical stepped profile and inclined, from top to bottom, towards the rear.

[0018] According to an advantageous embodiment of the invention, for each of the flat optical guides of the plurality of lighting sub-modules, the input face is transverse to the output face and the reflection face has a curved vertical profile capable of reflecting the light from the input face towards the output face along an optical axis of the corresponding lighting sub-module.

[0019] According to an advantageous embodiment of the invention, each of the flat optical guides of the plurality of lighting sub-modules comprises a connection portion with two diverging lateral faces, connecting the sheet to the output face, said output face having a curved transverse profile forming a lens.

[0020] According to an advantageous embodiment of the invention, the lighting module further comprises additional light sources arranged at the rear of the two diverging faces of the flat optical guides of the plurality of lighting sub-modules, configured to provide a daytime lighting function.

[0021] According to an advantageous embodiment of the invention, the flat optical guides of the plurality of lighting sub-modules extend in a main horizontal direction, when the lighting module is in the mounting position and observed from the front, and are offset longitudinally relative to each other so that the output faces of said flat optical guides have an inclined or curved vertical profile.

[0022] According to an advantageous embodiment of the invention, the output face of each of the flat optical guides of the plurality of lighting sub-modules has a horizontal stepped profile and is inclined, from an interior side to an exterior side of the vehicle, towards the rear.

[0023] According to an advantageous embodiment of the invention, for each of the flat optical guides of the plurality of lighting sub-modules, the reflection face comprises facets capable of reflecting the light from the input face towards lenses on the output face along an optical axis of the corresponding lighting sub-module.

[0024] According to an advantageous embodiment of the invention, for each of the flat optical guides of the plurality of lighting sub-modules, the reflection face has a profile such that a distance between the output face and the reflection face, along the optical axis of the corresponding lighting sub-module, decreases as a distance between said reflection face and the input face increases.

[0025] According to an advantageous embodiment of the invention, the lighting module further comprises additional light sources arranged behind the reflection faces of the flat optical guides of the plurality of lighting sub-modules, configured to provide a daytime lighting function.

[0026] The invention may relate to a headlight for a motor vehicle, comprising a housing forming a cavity, a glass for closing the cavity, on the housing, and a lighting module arranged in the cavity, said lighting module being according to the invention.

[0027] The measures of the invention are advantageous in that they make it possible to produce a lighting module providing at least two regulatory lighting functions while having lit appearances in the different functions that are very similar, or even identical. The lighting module can also be elongated vertically and have inclinations or curves in vertical and horizontal planes, which is advantageous for integration into the bodywork of a motor vehicle. A third lighting function, namely daytime running lighting, can also be easily integrated, while maintaining a lit appearance that is very similar, or even identical, to those of the other lighting functions. Brève description des dessins

[0028] [ Fig.1 ] is a perspective view of the front face of a vehicle equipped with a lighting device according to the invention; [ Fig.2 ] is a front view of a lighting module according to a first embodiment of the invention; [ Fig.3 ] is a perspective view of a lighting sub-module of the lighting module of the [ Fig.2 ] ; [ Fig.4 ] is a horizontal sectional view of the front portion of the lighting sub-module of the [ Fig.3 ] ; [ Fig.5 ] is a side view of the lighting module of the [ Fig.2 ] ; [ Fig.6 ] is a view along section VI-VI of the lighting module of the [ Fig.2 ] ; [ Fig. 7 ] is a side view of a variant of the lighting module of the [ Fig.2 ] ; [ Fig.8 ] is a front view of a lighting module according to a second embodiment of the invention; [ Fig.9 ] is a top view of a lighting sub-module of the lighting module of the [ Fig. 8 ], the sub-module being, in principle, known, the claimed combination of several sub-modules in a lighting module constituting the invention. Description détaillée

[0029] In the following description, the directions and senses expressed by terms such as "front", "rear", "longitudinal", "up", "down", "inner" and "outer" are to be understood when the lighting module is in the normal mounting position on the motor vehicle.

[0030] There [ Fig.1 ] is a schematic illustration of the left front part of a motor vehicle equipped with a headlight according to the invention.

[0031] The motor vehicle 2 comprises a front bumper 4, a left front wing 6 and a hood 8 between which a headlight 10 is arranged. This is a left headlight, it being understood that the right headlight, also according to the invention, is symmetrical to the left headlight 10 with respect to a vertical median longitudinal plane. The headlight 10 extends in a main vertical direction. It thus has at its protective glass a height H and a width l, the height H being greater than or equal to five times the width l. It should also be noted that the protective glass of the headlight 10 may be inclined backwards along its height from bottom to top. Similarly, it may also be inclined backwards along the width from the inside of the vehicle to the outside of the vehicle. These inclinations may be formed by inclined or curved vertical and horizontal profiles. It is understood that these inclinations and curved profiles depend on the geometry of the motor vehicle and are essentially geometric constraints that the present invention makes it possible to integrate. It is thus understood that these inclinations and curved profiles are not in themselves essential characteristics.

[0032] THE figures 2 à 7 illustrate a lighting module of the projector 8 of the [ Fig.1 ], according to a first embodiment of the invention.

[0033] There [ Fig.2 ] is a front view of the lighting module 12 according to the first embodiment. It comprises a juxtaposition of lighting sub-modules 12 and 14 each consisting essentially of a vertical optical sheet guide and at least one associated light source. The lighting sub-modules comprise first lighting sub-modules 14 each capable of forming a lighting sub-beam with an upper horizontal cut-off and second lighting sub-modules 16 each capable of forming a lighting sub-beam without an upper horizontal cut-off. The juxtaposition of the first and second lighting sub-modules 14 and 16 is alternating so as to mix the first lighting sub-modules 14 with the second lighting sub-modules 16. At [ Fig.2 ], the first lighting sub-modules 14 are represented by hatched surfaces as opposed to the second lighting sub-modules 16. At [ Fig.2 ], the alternation is perfect in that each lighting sub-module directly adjacent to another lighting sub-module is of the other type. In other words, each lighting sub-module directly adjacent to one of the first lighting sub-modules 14 is one of the second lighting sub-modules 15 and vice versa.

[0034] In the “low beam” type lighting function, only the first lighting sub-modules 14 are active, i.e. powered at their light sources. They form first lighting sub-beams with a higher horizontal cut-off which, when added together, form a first regulatory lighting beam of the higher horizontal cut-off or “low beam” type. Due to the alternating arrangement of the first and second lighting sub-modules 14 and 16, the overall output face of the lighting module 12 has a generally uniform illuminated appearance, at least at a minimum viewing distance, for example one meter.

[0035] In the “highway” type lighting function, the second lighting sub-modules 16 are active, i.e. powered at their light sources, advantageously in addition to the first lighting sub-modules 14. In this case, the overall output face of the lighting module 12 is fully illuminated, thus providing an illuminated appearance close to or even identical to that of the “low beam” type lighting function. It should be noted, however, that it is also possible that in the “highway” type lighting function, only the second lighting sub-modules 16 are active, in which case the illuminated appearance of the overall output face of the lighting module 12 is almost identical to that of the “highway” type lighting function.

[0036] The similarity of the illuminated aspects just explained above is the result of the alternating juxtaposition of the first and second lighting sub-modules 14 and 16, combined with the thinness or reduced width of the first and second lighting sub-modules 14 and 16. Depending on the widths of the first and second lighting sub-modules 14 and 16, their number and the minimum observation distance, the alternation may deviate from a strict alternation like that illustrated in [ Fig.2 ]. It is indeed possible to group several of the first lighting sub-modules 14 while providing one or more of the second lighting sub-modules 16 between these groups, and vice versa.

[0037] The lighting module 12 may comprise a third lighting sub-module 17, producing a lighting sub-beam with a raised upper horizontal cut-off (commonly referred to as a kink), in addition to the first lighting sub-modules 14 producing the lighting sub-beams with a straight upper horizontal cut-off. This lighting sub-beam with a raised upper horizontal cut-off may be slightly extended horizontally in comparison with the combination of lighting sub-beams with a straight upper horizontal cut-off. This third lighting sub-module 17 may be produced in different ways, per se well known to those skilled in the art.

[0038] There [ Fig.3 ] illustrates in perspective one of the first and second lighting sub-modules 14 and 16. It essentially comprises a sheet optical guide 18 and at least one light source 20. The sheet optical guide 18 comprises an input face 18.1, an output face 18.2 and a reflection face 18.3. The at least one light source 20 is arranged opposite the input face 18.1. The reflection face 18.3 has a curved vertical profile, advantageously parabolic, dimensioned to reflect, advantageously by total reflection, the light propagating in the body of the optical guide in a sheet, from the entry face 18.1, towards the exit face 18.2, and this along an optical axis 18.4 of the lighting sub-module 14 or 16. In the case of one of the first lighting sub-modules 14, the vertical profile of the reflection face 18.3 is advantageously parabolic with a focus located at the rear edge of the at least one light source 20 so as to reflect all the light rays along the optical axis 18.4 or a downward direction relative to this axis.

[0039] Always at the [ Fig.3 ], it can be observed that the output face 18.2 has a curved horizontal profile, for example circular or elliptical, and is connected to the body of the optical sheet guide by a connection portion 18.5 of the optical sheet guide having two diverging lateral faces 18.5.1 and 18.5.2. This connection portion 18.5 forms with the output face 18.2 a projection lens.

[0040] It should be noted that the principle of construction and operation of the first and second lighting sub-modules described above in relation to the figures 2 And 3 is known per se from published patent document EP 2 045 515 A1.

[0041] There [ Fig.4 ] is a horizontal sectional view of the front part of the optical guide in sheet 18 of the [ Fig.3 ]. Two ray tracings, in continuous lines, can be observed coming from the at least one light source 20 opposite the entrance face 18.1 ([ Fig.3 ]). These rays can spread horizontally in the connecting portion 18.5 and be refracted when passing through the diopter formed by the exit face 18.2.

[0042] Additional light sources 22 may be arranged opposite at least one of the two lateral faces 18.5.1 and 18.5.2 of the connection portion 18.5. These additional light sources are in this case optical guides of circular section, supplied with light at one end and configured to distribute the light along said optical guide, the latter exiting transversely towards the lateral face(s) 18.5.1 and 18.5.2. It is understood that other optical systems, in particular well known per se, are conceivable. These additional light sources 22 make it possible to perform a third lighting function, namely a daytime lighting function or even “DRL” (“Daytime Running Light”). Four ray tracings, in broken lines, coming from the additional light sources 22 can be observed. These rays are relatively spread horizontally in the connection portion 18.5 and exit from the exit face 18.2 in a spread manner, which is particularly suitable for this lighting function.

[0043] There [ Fig.5 ] is a side view of the lighting module of the [ Fig.2 ]. One of the first lighting sub-modules 14 can be seen there, it being understood that this illustration also applies to the second lighting sub-modules 16. The output face 18.2 of the optical sheet guide 18 may have a vertical stepped profile so that the lighting module can have a rearward inclination from the bottom to the top of the overall output face. As mentioned previously, the first lighting sub-modules 14 are configured to produce lighting sub-beams with a higher horizontal cut-off. The connecting sections 18.2.2 between the vertical sections 18.2.1 of the output face 18.2 may have a downward inclination, from the back to the front, so that the rays meeting them are deflected downwards. This means that these connecting sections 18.2.2 do not disturb the higher horizontal cut-off. The [ Fig.5 ], being a profile view, shows only the front end of the outlet face 18.2; it is however understood that the vertical sections 18.2.1 have curved horizontal contours extending vertically and the connecting sections 18.2.2 have curved horizontal contours having an inclination which varies along said contour, this inclination being advantageously maximum at the front end as illustrated in [ Fig.5 ].

[0044] There [ Fig.6 ] is a sectional view VI-VI of the lighting module 12 of the [ Fig.2 ]. Only three lighting sub-modules, namely two first lighting sub-modules 14 and a second lighting sub-module 16 are shown. It is observed that the first and second lighting sub-modules 14 and 16 are progressively shifted rearward from the inside to the outside of the vehicle, i.e. from left to right at [ Fig.6 ], for a left headlight of the motor vehicle. This offset allows the lighting module 12 to have an overall output face with an inclined profile, as mentioned above in relation to the [ Fig.1 ], in particular in order to conform to the body of the motor vehicle. Such an arrangement can limit the output face on one side and increase it on the other side. Indeed, if we consider the second lighting sub-module 16 located between the first two lighting sub-modules 14, the left part (following the orientation at [ Fig.6 ]) of the output face 18.2 is partially obscured by the output face 18.2 of the first lighting sub-module 14 located to its left and offset forward. Similarly, the right part (following the orientation at [ Fig.6 ]) of the exit face 18.2 is free of obstacles for the light rays of the lighting sub-beam which emerge therefrom due to the rearward withdrawal of the exit face 18.2 of the first lighting sub-module 14 located to its right. This situation is illustrated by the two continuous line ray tracings, the ray exiting from the left part of the exit face 18.2 passing in front of the exit face 18.2 of the first lighting sub-module 14 on the left and representing the limitation to the left of the exit face for the corresponding lighting sub-beam. The ray exiting from the right part of the exit face 18.2 shows that this right part is not or only slightly limited by the presence of the first lighting sub-module 14 to its right. In other words, the limitation of the active area of ​​the output face on one side is compensated by an increase on the opposite side when the first and second lighting sub-modules are longitudinally offset.

[0045] Always at the [ Fig.6 ] it can be observed that the light emitted by the additional light sources 22, for the daytime lighting function, is transmitted into the connection portion 18.5 of the optical sheet guide 18 with angles more inclined relative to the optical axis 18.4 and can thus exploit a larger area of ​​the output face 18.2 on the side where the first neighboring lighting sub-module is offset forward. A ray trace, in broken line, illustrates this phenomenon.

[0046] It may be advantageous to space the lighting sub-modules 14 and 16 transversely apart to limit the mutual occultations described above and / or to make the output faces 18.2 and the connection portions 18.5 asymmetrical with respect to the optical guide sheet so as to direct the light more towards the non-occulted side.

[0047] It is understood that what has just been described in relation to one of the second lighting sub-modules 16 also applies to the first lighting sub-modules 14 as long as they are adjacent to second lighting sub-modules 16 offset longitudinally, in a manner similar to the [ Fig.6 ].

[0048] There [ Fig.7 ] is a side view of a variant of the first and / or second lighting sub-modules 14 and 16. One, several or each of the first and / or second lighting sub-modules 14 and 16 may comprise two lighting sub-modules 14.1 and 14.2 or 16.1 and 16.2 arranged opposite each other with respect to a horizontal plane, as illustrated in [ Fig.7 ]. The optical guides in sheet form 181 and 182 of the two lighting sub-modules 14.1 and 14.2 or 16.1 and 16.2 have their input faces 181.1 and 182.1 opposite each other. The respective light sources 20.1 and 20.2 are also opposite and advantageously arranged on the same plate. These light sources 20.1 and 20.2 are advantageously offset longitudinally, that is to say along the optical axis 18.4. This offset makes it possible to avoid overheating of the light sources and their surroundings. It makes it possible to take into account the fact that for the upper lighting sub-module 14.1, it is advantageously the rear edge of the light source 20.1 which is located at the focus of the parabolic profile of the reflection face 181.3, whereas for the lower lighting sub-module 14.2, it is advantageously the front edge of the light source 20.2 which is located at the focus of the parabolic profile of the reflection face 182.3. The light source 20.2 could then be located at the rear of the light source 20.1. The offset also makes it possible to compensate for the average longitudinal offset between the two optical sheet guides 181 and 182 due to the inclined profile, in this case backwards from bottom to top, of the total output face of the first or second lighting sub-module 14 and 16. The output faces 181.2 and 182.2 are aligned longitudinally where they are adjacent, in this case at the optical axis 18.4. Such a configuration makes it possible to increase the vertical extent of the first or second lighting sub-module 14 and 16 and to increase the lighting power thereof.

[0049] THE figures 8 And 9 illustrate a lighting module of the projector 8 of the [ Fig.1 ], according to a second embodiment of the invention. The reference numbers of the first embodiment are used to designate identical or corresponding elements, these numbers being increased by 100. Reference is also made to the description of these elements in the context of the first embodiment. Specific numbers between 100 and 200 are used to designate the specific elements.

[0050] With reference to the [ Fig.8 ] and unlike the [ Fig.2 ] of the first embodiment, the first and second lighting sub-modules 114 and 116 are arranged horizontally and juxtaposed vertically. Similar to the first embodiment, the first lighting sub-modules 114 are each capable of forming a lighting sub-beam with an upper horizontal cutoff and the second lighting sub-modules 116 are each capable of forming a lighting sub-beam without an upper horizontal cutoff. The juxtaposition of the first and second lighting sub-modules 114 and 116 is alternating, similarly to the first embodiment, so as to mix the first lighting sub-modules 114 with the second lighting sub-modules 116.

[0051] There [ Fig.9 ] is a top view of one of the first or second lighting sub-modules 114 and 116. It comprises a flat optical guide 118 with an input face 118.1 for the light emitted by the at least one light source 120, an output face 118.2 and a reflection face 118.3. The output face 118.2 comprises reliefs forming projection lenses 118.2.1 and the reflection face 118.3 comprises reflection facets 118.3.1 configured to return, by reflection, light towards the reliefs of the output face 118.2 forming projection lenses 118.2.1. The reflection facets 118.3.1 are arranged in a staircase manner so as to reflect different portions of the transmitted light into the flat optical guide 118. In the present case, the entrance face 118.1 is generally parallel to the exit 118.2 and reflection 118.3 faces, so that an intermediate reflection face 118.6 is provided between the entrance face 118.1 and the main part of the flat optical guide 118 delimited by the exit faces 118.2 and reflection faces 118.3. It is however possible to provide an entry face 118.1 transverse, or even perpendicular, to the main direction of the flat optical guide 118 delimited by the exit faces 118.2 and reflection faces 118.3, in which case the intermediate reflection face 118.6 is not necessary.

[0052] Similar to the first embodiment, additional light sources 122 can be arranged at the rear of the flat optical guides 118, in this case opposite the reflection face 118.3, so as to be able to provide a third lighting function, namely a daytime lighting function.

[0053] The first and second lighting sub-modules 114 and 116 may be offset rearwardly, from bottom to top, so as to present an overall output face with an inclined, or even curved, profile in a vertical plane in order to conform to the body of the motor vehicle.

[0054] As can be seen in the [ Fig.9 ], the reliefs of the exit face 118.2 forming the projection lenses 118.2.1 can be progressively shifted towards the rear, from the inside to the outside of the motor vehicle, in this case from left to right following the [ Fig.9 ], so as to present an overall exit face with an inclined, or even curved, profile in a horizontal plane in order to conform to the body of the motor vehicle.

[0055] The upper horizontal cut-off of the sub-beams of the first lighting sub-modules 114 may have a kink, by adapting the reflection facets 118.3.1 and the corresponding projection lenses 118.2.1. The presence of a third projection sub-module ensuring a cut-off with a kink, such as the third lighting sub-module 17 ( [ Fig.2 ]) of the first embodiment is not necessary. It may, however, be provided in a similar manner.

[0056] It should be noted that the principle of construction and operation of the first and second lighting sub-modules described above in relation to the figures 8 And 9 is known per se from published patent document EP 2 679 884 A1.

Claims

1. Lighting module (12; 112) for a motor vehicle (2), comprising a plurality of lighting sub-modules (14, 16; 112, 116) each comprising: - at least one light source (20; 120); - a flat optical guide (18; 118) with an entry face (18.1; 118.1) facing the at least one light source (20; 120), an exit face (18.2; 118.2) and, at the rear of the exit face (18.2; 118.2), a reflection face (18.3; 118.3) capable of reflecting light from the entry face (18.1; 118.1) toward the exit face (18.2; 118.2); characterized in that the plurality of lighting sub-modules (14, 16; 114, 116) comprises first lighting sub-modules (14; 114) configured to each produce a lighting sub-beam with horizontal upper cutoff and second lighting sub-modules (16; 116) configured to each produce a lighting sub-beam without horizontal upper cutoff; and the first and second lighting sub-modules (14, 16; 114, 116) are juxtaposed in such a way as to form, along the juxtaposition, several alternations between the first and second lighting sub-modules (14, 16; 114, 116).

2. Lighting module (12; 112) according to Claim 1, wherein the flat optical guides (18; 118) of the plurality of lighting sub-modules (14, 16; 114, 116) extend in a horizontal or vertical main direction, when the lighting module is in the assembly position and seen from the front.

3. Lighting module (12; 112) according to either of Claims 1 and 2, wherein the exit faces (18.2; 118.2) of the flat optical guides (18; 118) of the plurality of lighting sub-modules (14, 16; 114, 116) are adjacent and form an overall exit face of the lighting module having a height H and a width l, said height H being greater than or equal to 5 times said width l.

4. Lighting module (12; 112) according to one of Claims 1 to 3, wherein the several alternations between the first and second lighting sub-modules (14, 16; 114, 116) are in a number corresponding to the number of first lighting sub-modules (14; 114) or to the number of second lighting sub-modules (16; 116).

5. Lighting module (12) according to one of Claims 1 to 4, wherein the flat optical guides (18) of the plurality of lighting sub-modules (14, 16) form sheets extending in a vertical main direction, when the lighting module is in the assembly position and seen from the front, and are offset longitudinally relative to one another such that the exit faces (18.2) of said flat optical guides (18) have an inclined and / or curved horizontal profile, and preferably wherein the exit face (18.2) of each of the flat optical guides (18) of the plurality of lighting sub-modules (14, 16) has a vertical profile that is stepped and inclined, from top to bottom, rearward.

6. Lighting module (12) according to Claim 5, wherein, for each of the flat optical guides (18) of the plurality of lighting sub-modules (14, 16), the entry face (18.1) is transverse to the exit face (18.2) and the reflection face (18.3) has a curved vertical profile capable of reflecting the light from the entry face (18.1) toward the exit face (18.2) along an optical axis (18.4) of the lighting sub-module (14, 16).

7. Lighting module (12) according to either of Claims 5 and 6, wherein each of the flat optical guides (18) of the plurality of lighting sub-modules (14, 16) comprises a connection portion (18.5) with two divergent lateral faces (18.5.1, 18.5.2), connecting the sheet to the exit face (18.2), said exit face (18.2) having a curved transverse profile forming a lens.

8. Lighting module (12) according to Claim 7, further comprising additional light sources (22) arranged at the rear of the two divergent faces (18.5.1, 18.5.2) of the flat optical guides (18) of the plurality of lighting sub-modules (14, 16), configured to operate in a daytime lighting mode.

9. Lighting module (112) according to one of Claims 1 to 4, wherein the flat optical guides (118) of the plurality of lighting sub-modules (114, 116) extend in a horizontal main direction, when the lighting module is in the assembly position and seen from the front, and are offset longitudinally relative to one another such that the exit faces (118.2) of said flat optical guides (118) have an inclined or curved vertical profile.

10. Lighting module (112) according to Claim 9, wherein, for each of the flat optical guides (118) of the plurality of lighting sub-modules (114, 116), the reflection face (118.3) comprises facets (118.3.1) capable of reflecting the light from the entry face (118.1) toward lenses (118.2.1) on the exit face (118.2) along an optical axis (118.4) of the lighting sub-module (114, 116), and preferably wherein, for each of the flat optical guides (118) of the plurality of lighting sub-modules (114, 116), the reflection face (118.3) has a profile such that a distance between the exit face (118.2) and the reflection face (118.3), along the optical axis (118.4) of the lighting sub-module (114, 116), decreases as a distance between said reflection face (118.3) and the entry face (118.1) increases.

11. Lighting module (112) according to Claim 10, further comprising additional light sources (22) arranged at the rear of the reflection faces (118.3) of the flat optical guides (118) of the plurality of lighting sub-modules (114, 116), configured to operate in a daytime lighting mode.